MATHEMATICS HIGH SCHOOL

HELPPP ASAPPP! PLZWhich system has no solution?
A.4y = 2x – 6

B.3x + 5y = 7
4x = 2y – 5

C.2y = 4x + 2

D.2x = 5y + 4
15y = 6x – 12

Answers

Answer 1

Answer:

Answer : D

2x=5y+4

15y=6x-12

Solve 2x=5y+4 for x

Divide both sides by 2

2x/2=(5y+4)/2

x = 5/2 y +2

Substitute 5/2 y +2 for x in 15y=6x-12

15y= 6x-12

15y= 6(5/2 y +2 ) -12

Simplify both sides of the equation

15y=15y

Add -15y to both sides

15y-15y= 15y-15y

0=0

Hey Lily , I hope this help and if you have question(s) please let me know . Thanks

Related Questions

Mrs. aviles is planning a fruit-cup party for a class of 18 students and two teachers. She spends $10 for a package of snacks and also takes orders in advance for fruit cups that cost $3 each. 1. describe the domain of the function both in words and numbers? 2. what is the range?
Simplify the ratio 40 : 28
What is the slope-intercept equation for the line below?
For which equation is x=-1/3 not a solutionA. 7+9x=4 B. 6x-5=7 C. 18+9/x=-9 D. 12x+8=4
Write an expression that matches the verbal expression: seven less than a number.

Fuel economy estimates for automobiles built one year predicted a mean of 28.2mpg and a standard deviation of 4.8mpg for highway driving. Assume that a Normal model can be applied. Use the 68−95−99.7 Rule to complete parts b) through e). b) In what interval would you expect the central 99.7% of autos to be found. Using the 68-95-99.7 rule, the central l99.7%of autos can be expected to be found in the interval from __- to __ MPG c) what percent of autos should get more than 33mpg Usign the 68-95 rule about __% of autos should get more than 33mpg D) what percent of autos should get between 33 and 37.8mpg E) Describe the gas milage of the best 2.5% of cars a) they get more than 42.6mpg b) they get less than 23.4 mph C) they get more than 33 mpg D) they get more than 37.8 mpg

Answers

Answer:

See below

Step-by-step explanation:

a) The central 99.7% of autos are expected to be found in the interval from 13.8 mpg to 42.6 mpg.

c) About 32% of autos should get more than 33 mpg.

d) The percentage of autos that should get between 33 and 37.8 mpg is 32%.

e) The best 2.5% of cars get more than 42.6 mpg.

2. Given XYZ, if XY =YZ, and Y = 22,
find Z.

Answers

Answer:

Step-by-step explanation:

Sum of Triangle angles is 180

180 - 22 = 158

If the sides are the equal, the base angles are equal.

So, divide 158 by 2

Patricia roller skates 0.50 kilometers, straight north to the library. Then she walks 0.25 kilometers to her friend's house, which is straight north of the library. What is Patricia's displacement?

Answers

The answer is 0.75 kilometers.

Displacement is the shortest distance between the initial and the final point. But, Patricia roller skates in the straight line, so her displacement is the distance between the initial and the final point:

0.50 km + 0.25 km = 0.75 km.

Therefore, Patricia's displacement is 0.75 kilometers.

The answer is: 0.75 km, north

A group of 8 friends (5 girls and 3 boys) plans to watch a movie, but they have only 5 tickets. If they randomly decide who will watch the movie, what is the probability that there are at least 3 girls in the group that watch the movie? A. 0. 018 B. 0. 268 C. 0. 536 D. 0. 821.

Answers

Answer:

B. 0.268

Step-by-step explanation:

if there are more than half boys then girls it as t be und .5 since that's half and .018 is to low

Andrew has six fewer coins than Casey. Bob has two more than twice as many coins as Andrew. Altogether, they have 504 coins. How many coins does Bob have?

Answers

Andrew: x - 6
      Bob: 2x - 12
Casey: x

(x - 6) + (2x - 12) + x = 504
(x + 2x + x) + (-6 - 12) = 504
      4x - 18 = 504
      + 18   + 18
       4x = 522
      4    4
   x = 130.5

Solve to the nearest tenth
$√(18)$